The utility model provides a special hard support suitable for three wire-unwinding tackles of a strain-resistant tower with a large rotation angle, and solves the technical problems in the prior art that for a strain-resistant segment with the rotation angle larger than 60 degrees, a straight-through wire-unwinding scheme has to be adopted in construction, or the envelope angle is greater than 30 degrees. The special hard support is characterized in that the special hard support comprises an isosceles-triangle steel plate, the base angles of the isosceles-triangle steel plate are 10-30 degrees, three corner parts are respectively provided with an installation hole, annular reinforcing rings are welded on the steel plate on the periphery of the installation holes, and a plurality of binding strips are welded close to the edges of the steel plate. The special hard support is reasonable in structure, and the support of the three wire-unwinding tackles is provided to meet the construction requirement that the wire envelope angle of one single wire-unwinding tackle is less than 30 degrees in the straight-through tensional wire-unwinding process of the strain-resistant tower with the large rotation angle; in addition, the supporting strength is high, the special hard support is not liable to deform, and the construction safety is ensured.